I can definitely see how that experience for that long would get anyone down. But I do believe you can do it. Just keep knocking on those doors and eventually one will open.

The thing about the advice to keep hopeful and confident is that interviewers will decide based on their impression of you - you have to “fake it till you make it” enough to motivate yourself to stay in the race and to get past that all important interview.

Even the crap jobs that get you down, try to look on them as opening that door. No you shouldn’t expect more out of a place treating you like crap, but if you do find that door opening to greener pastures, you want to look like a good worker well worth their investment. You can do it